Spark-plug.



E. HABER SPARK PLUG.

APPLlcATmn' man orc. is. 1914.

1 1 82,3 1 2 Patented May 9, 1916.

@ad f@ C?. J f5 ELMER RABER, 0F BALTIC, OHIO.

SPARK-PLUG.

Specification of Letters'Patent. A

Patented May 9, 1916.

Application led December 16, 1914. Serial yN0. 877,559.

To all whom it may concern Be it known that I, ELMER RABER, a citizen of the United States, residing at Baltic, in the county ofHolmes and State of Ohio, have invented certain new and useful Improvements in Spark-Plugs, of which the following is a. specification.

This invention relatesV to spark plugs and has primarily for its object to reduce possibility of carbonizing the sparking terminals to a minimum.

Another object of the invention is to provide superposed contact points, to make a double jump spark for magnifying the surface of the spark to obtain a rapid ignition.

Other objects as well as the nature, characteristic features and scope of my invention will be more readily understood from the following description taken in connection with the accompanying drawings and pointed out in the claims forming a part of this speciication.

Referring to the drawings: Figure 1 is a side elevational view of a spark plug constructed in accordance with my invention, Fig. 2 is a longitudinal sectional view of the same, illustrating its application to an engine cylinder, and Fig. 3 is a bottom plan View showing to advantage the contact points of the casing.

In the drawings wherein is illustrated the preferred embodiment of this invention, in order to show the application of the invention, a portion of an engine cylinder 5 is provided which has detachably mounted therein the casing 6 of my kimproved plug, the inner end of the latter being reduced, as indicated at 7, and having a smooth outer periphery, While Vthe main body of the casing is externally screw-threaded for threaded engagement with complement-al threads in the cylinder in the usual manner. An annular flange 8 is arranged on the outer end of the casing 6 in order to facilitate insertion of the casing in the cylinder and to limit the movement of the latter.

A pair of contacts 9 are carried by the casing 6 and extend through the inner pel riphery of the latter and into the bore of the casing, thefree ends of said contacts being arranged in superposed relation und being spaced from each other as shown to advantage in Fig. 2, the inner of said contacts being insulated from the casing 6. The contacts 9 are identical in configuration and are completely housed in the casing i in order to reduce possibility of their carboniza'tion by the products of combustion to a minlmum, since the contacts, are of course, made of any suitable conductive material.

Mounted inthe casing 6 is the plug body 10 which is made of porcelain or any other suitable insulating material, being provided adJacent one end thereof with an annular flange 11, which seats in a complemental enlarged portion of the casing, and provides an engageable means by which the plug body is held from displacement in view of a nut 12, the latter being provided with a smooth bore through which the plug body passes, and being externally screw-threaded for engagement with complemental threads in the casing 6 and annular collar 8. The plug body 10 may, of course, be of the usual or any desired configuration, in the present instance, a conventional form of body being shown in order to illustrate the application of the invention.

An electrode 13 is'con'centrically arranged in the body 10, the inner or sparking end 14 of which is reduced so as to provide a small point, while the opposite end extends for an appreciable distance above the body 10 and is screw-threaded as indicated at 14:', for screw-threaded engagement with nuts 15 and 16, the former being engaged with a washer and having one of the terminals 17 of the electrical source of supply superposed thereon, said terminal being held from displacement by the nut 16.

By the arrangement as above set forth, it is therefore seen that the free terminals of the contacts 9 are arranged in superposed relation, as previously stated, while the sparking terminal 14 of the electrode 13 is superposed, the free ends of said contacts, thereby making a double jump for the spark, which by this formation will be magnifed so as to produce a rapid ignition, and at the same time, carbonization of the confacts 9 and terminals 14 will be reduced to a minimum in view of the positioning of the frame in the casing 6. Diametrically opposite openings 18 are formed in the casing 6, so that the proximity of the sparking terminals 14 and 9 will be Visible. In operation therefore, it is seen that when the electrical energy is passed through the electrode 13. that this will close the circuit therebetween and the contacts 9 for producing an enlai-ged spark to expedite ignition.

lt will be understood that the above description and accompanying drawings comprehend only the general and preferred embodiment of my invention and that various minor changes in details of construction, proportion and arrangement of parts may be made within the scope of the appended claims without sacrificing any of the advantages of my invention.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

l. A spark plug including a casing, an electrode associatedwith said casing and insulated therefrom, said electrode having one end thereof in rconnection with an electrical source of energy, and the opposite end extended into the casing to provide a sparking terminal which is completely housed within said casing, and superposed contact points carried by said casing and completely housed therein, to coact with the sparking terminal of the electrode for expediting ignition.

2. A spark plug including a casing, contacts mounted in said casing and completely housed therein, the free terminals of said contacts being superposed and spaced from each, and an electrode mounted in the casing and .insulated therefrom, one end of said electrode being in connection with an electrical source `of energy, and the opposite end arranged in proximity to Said contact and within the casing to reduce carbonization of 'the contacts and sparking terminal to a minimum.

3. A spark plug including a casing, an insulated body detachably mounted in said casing, an electrode arranged in said body, one end thereof being in connection with an electrical source of energy, and the opposite end being reduced and extended beyond the body to provide a sparking terminal, and contacts extended froml the casing and having the free terminals thereof superposed in spaced relation to each otherand in spaced relation to the sparking terminal of said electrode to provide aI double jump spark when the circuit is closed between the electrode and said casing to expedite ignition.

In testimony whereof I alix my signature in presence of two witnesses.

i ELMER HABER.

Witnesses:

A. M. TROYER,

M. K. TROYER. 

